Casing for cardan joints.



M. BARBAROU.

lGASINGr FOR CARDAN JOINTS. APPLIOATION FILED DEQ. 1910,

Patented'uly "FI, 19M.

ruin rare Parana ruins.

IVIARIUS BARBAROU, 1OIFl ST.DENIS, FRA1\TGE, ASSIGNOR TO SOCIT ANONYME DES AUTOMOBILES DELAUNlAY-BELLEVILLE, F STX-DENIS, FRANCE. A CORPORATION- 0F FRANGE.

incassa.

. ployment of Cardan, joints resides in the )difficulty experienced in retaining the lubricant in prolonged contact with the parts to be lubricated without experiencing considi erable losses. During the rotation lthe actionv of centrifugal force constantly7 tends to expel the fluid particles in which the ,joints run; thereby largely increasing the con-` s'umption of lubricant The employment of 'panying drawing,

leather sleeves, as heretofore adopted, does not 'obviate this defect because the lubricant` being vigorously forced by centrifugal force against the leather walls and the bindings by'means of which they are fixed, works its way through the pores of the leatherA and' through the interstices of the 'bindings' and eventually bursts the leather .envelop in which it is contained The present invention consists of a, device having for its object to obviate this defect while causing the lubricant to remain permanently in contact with the parts to 'be lu-- 'bricated and preventing it from being projected to tlie exterior.

This device is represented in. the .accomwhere- Figure 1 is a horizontal section'of a Car dan box, ony the axes of the shafts. Fig. 2

shows a modifiedconstruction. e The' substantially hemispherical front casing member of the Cardan-joint is keyed on the driving shaft a, .and rearwardly this member o r section ends in a flange 1 to which a corresponding-flange. 2 of the rear between'b and c which embraces the bearj'v -ings and thel ends of the cross provides a section c of the Cardan joint is bolted. The

sections 'Z2 aiidc which form the case ofthe Cardan joint hold between them lthe two bearings which v'receive the shaft d of the ordinary Cardan cross; a joint interposed good joint for the assemblage of the parts. lnternally the section c is flared, its large Specification of Letters Patent.

cAsING ron CARDAN JoiivTs.

Patented-amy a, raie.

Application filed December 8, 1910. Serial No. 596,212.

basefbeing located inflthe plane of assemblage oft and c; toward the rear-it ends in a iange 3 upon which a coliar c is fixed by means of screws or bolts; this collar is frusto-conical inthe inverse direction, its central p ortion being turned` over toward the interior ofthe section o. rlhe central hole, in the collar is suliiciently large to en- Between thecollar c and the shaft f a retaining leather g is interposed this `leather is lpliable and of suilicient thickness, and in section it presents approximately the form of a hollowed semi-torus, the convexity of which is directed toward the front section Z2.

By reason of its pliability the retaining sleeve g readily adapts' itself to the oscillations of the shaft f without thei necessity forl subjecting it "to abnormal deformations. rlhe leather is fixed by means of bindinggfi, 5 upon the collar c and upon the shaft f respectively. Upon therotation of the whole thus constituted (whiclifha'srbeeai filled with lubricant through the filling plug L') the vaction of centrifugal force far from pi'oject-v `ing tlielubricant onto the leather tends to cause the lubricant to flow toward the Yplace y in the inner cavity of the sections Z) and c, where the diameter is the maximum; this action is assisted by the flared Vform of the walls which they are given with this object.

Cir

The mass of lubricant 'is thus vigorously vapplied to the actual part ,where it is required and cannot be expelled from itsV metal casing. The maximum tangential 'effort is rationally applied at vthe place where the 4force is the maximum. The re` taining leather g on the contrary, is not subjected to';tlie influence of centrifugal force; its purpose is confined to preventing leakages at the shaft f andf thecollar e by `clamping and a suitable/arrangement of the bindings.l lt is not subjected to-`tensile strains.' even in case an appreciableinternal pressure arising from the heating of the lurican't should occur, such an action result# ing in contracting the leather which tends toclose up its ports, the pressure being ex- '.erted in tlie direction indicated by the arrows.

ln Fig. 2 is represented a device differently arranged.

. rlhe frontcasing section I) of the cardan, which is hernispherical in form, 1s continued by a frusto-conical part c bored cylindrically at its end m to a suitable diame ter for the reception of a sleeve n which is held by a nuty p. The-internal diameter of this sleeve is snfiicientto permit of the nec'- essary oscillations of the4 Cardan' shaft' f.k Between the collars 1' andv s a lpiece of leather .z,.pliableibu't strong, is interposed which presents approximately the form of a cylinder bulged at -itsmiddle which readily radapts itself-to all displacements of the shaft f without the necessity of ,undergoing abnormal deformations The leather is fixed by tying it at 7c and'l 'uponf'the collars 0" and 3 "When. the Cardan mechanism filled with-lbricant rotates.,` the 'action'.of centrifugal force, far from' throwing the lubricant -ontfothe leather, tends vto keep itV away from same. During'the, periods of rest the bindings oppose any` leakage ofv lubricant and a perfectv joint.' isl thusinsuredin every case.

lt will be noted that in Aboth'of` forms` illustrated one ,of the easing membersfis,di-

casing member or .section so thatthecasj ing, as a whole, takes the place of oneof the forks usually employed 1n connection with' rectly keyed or otherwise fixed to 4one of .the

shafts, one element .of the cross being clamped between this member andthe other one of the shafts, said casing also serving to inclose all of the working parts of the ]o1nt,

Of course the casing 'might be applied di-V rectly Vto the driven shaft instead of the driving shaft, if.such'were desired. The form of the substantially hemispherical cas ingvmember applied to one shaft i5' such as to make", unnecessary the use of otherl protecting devicesV for 4the ]oint at that point. In each instance, the free-end of the other casmg section is connected with the other shaft by meansof a leather or, other viiexible piece extending between the open end of said section, to theshaft which is capable of oscillation in said open end, the flexible piece being bulged toward the lubricant-containing chamber. In each instance, also 'the fiexible piece of material is secured to the casing by means of an annular member fixed in theen.. openingof the casingl and extending inward into the latter, the connection between said vmember and the ,piece ofl flexible material being disposed `within the easing where it is fully protected. Moreover, it is advisable to bind the flexible piece against said annular member at thev 'inner surface' of the latter so that the pres- .sure of oil against the inner surface of thel .flexible piece will not tend to-break 'or damage the connection formedby/th'e binding of wire or the like.

l claim:

1. In a Cardan joint, the combination of y a shaft, an open'ended casing Securedthereto, ,means` to transmit motion from said shaft and easingscomprising a 'secondv` shaft and means for connecting said second shaft for universal movements within -the casing,

a ,pieceoflegible material secured at Aone edge tosaid means `Avto transmit motion, said second shaft 'extending' throughk the end opening'of said casing and having'free play therein, andan annular/member detachably secured in said end opening and havingra projecting portion extending 'into the casv ing, said p iece of Aflexible material being 4bulged inwardly with reference to the cas- 'ing and secured at its other edge to that side of said memberwhich'faces the easing.

l 2. ln a Cardan joint,lthe combination of a shaft, a cross connected therewith, a sec-f In testimony whereof I-aflix my signa-A ture, in presence. of two witnesses.

Witnesses: DEAN B. MAsoN,

Louis J osso.

.MAniUs B ARBAROU. i' 

